Modeling Foreign-born population The figure gives the percent of the U.S. population that was foreign-born for selected years from 1910 and projected to 2020.
Find the cubic function that is the best fit for the data. Use to represent 1900, and report the model to three significant digits.
Find the critical point of the reported model when .
Interpret this point in terms of the percent of foreign-born people in the U.S. population.
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